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nikitadnepr [17]
4 years ago
15

Most chemical reactions can be divided into how many main groups?

Physics
1 answer:
tatyana61 [14]4 years ago
5 0
There is synthesis
decomposition
double displacement
single displacement
combustion
metathesis
so i guess you could say 6
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A molecule that speed up a reaction
Diano4ka-milaya [45]

Answer:

I think it's a catalyst.

Explanation:

Definition: a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change

6 0
4 years ago
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A massless string connects a 10.00 kg mass to a 13.00 kg cart which is resting on a frictionless horizontal surface. The mass ha
ch4aika [34]

The cart's acceleration to the right after the mass is released  is determined as 7.54 m/s².

<h3>Acceleration of the cart</h3>

The acceleration of the cart is determined from the net force acting on the mass-cart system.

Upward force = Downward force

ma = mg

13a = 10(9.8)

13a = 98

a = 98/13

a = 7.54 m/s²

Thus, the cart's acceleration to the right after the mass is released  is determined as 7.54 m/s².

Learn more about acceleration here: brainly.com/question/14344386

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6 0
2 years ago
The drill used by most dentists today is powered by a small air-turbine that can operate at angular speeds of 350000 {\rm rpm} .
damaskus [11]

Answer:

5833.33

Explanation:

\alpha = Angular acceleration

\theta = Number of revolutions

\omega_i = Initial angular speed = 0

t = Time taken = 2 s

Final angular speed

\omega_f=\dfrac{350000}{60}=5833.33\ rps

From the equation of rotational motion we have

\omega_f=\omega_i+\alpha t\\\Rightarrow \alpha=\dfrac{\omega_f-\omega_i}{t}\\\Rightarrow \alpha=\dfrac{5833.33-0}{2}\\\Rightarrow \alpha=2916.665\ rev/s^2

\theta=\omega_it+\dfrac{1}{2}\alpha t^2\\\Rightarrow \theta=0\times t+\dfrac{1}{2}\times 2916.665\times 2^2\\\Rightarrow \theta=5833.33\ rev

The number of revolutions is 5833.33

6 0
3 years ago
To test the performance of its tires, a car
VLD [36.1K]

Answer:

0.45

Explanation:

Sum of forces in the y direction:

∑F = ma

N − mg = 0

N = mg

There are friction forces in two directions: centripetal and tangential.  The centripetal acceleration is:

ac = v² / r

ac = (31 m/s)² / 333 m

ac = 2.89 m/s²

The total acceleration is:

a = √(ac² + at²)

a = √((2.89 m/s²)² + (3.32 m/s²)²)

a = 4.40 m/s²

Sum of forces:

∑F = ma

Nμ = ma

mgμ = ma

μ = a / g

μ = 4.40 m/s² / 9.8 m/s²

μ = 0.45

5 0
4 years ago
Lamar Gant, U.S. powerlifting star, became the first man to deadlift five times his own body weight in 1985. Deadlifting involve
Masja [62]

Answer:

W = 5586[J]

Explanation:

Work in physics is defined as the product of force by a distance.

W=F*d

where:

W = work [J]

F = force = m*g [N]

m = mass = 300 [kg]

g = gravity acceleration = 9.81 [m/s²]

d = distance = 1.9 [m]

Now replacing:

W=m*g*d\\W=300*9.81*1.9\\W=5586[J]

4 0
3 years ago
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